PROSES UNTUK PEMBUATAN KOPOLIESTER-KOPOLIESTER ASAM TEREFTALAT, ETILEN GLIKOL DAN 1,4-SIKLOHEKSANADIMETANOL YANG MEMPERLIHATKAN SUATU WARNA NETRAL, KLARITAS TINGGI DAN CAHAYA YANG DITINGKATKAN

PROSES UNTUK PEMBUATAN KOPOLIESTER-KOPOLIESTER ASAM TEREFTALAT, ETILEN GLIKOL DAN 1,4-SIKLOHEKSANADIMETANOL YANG MEMPERLIHATKAN SUATU WARNA NETRAL, KLARITAS TINGGI DAN CAHAYA YANG DITINGKATKAN

This application relates to a three step process for preparing copolyesters exhibiting a neutral hue, high clarity and increased brightness. The process involves reacting terephthalic acid, ethylene glycol, and 1,4-cyclohexanedimethanol in a feed mole ratio of total glycols to dicarboxylic acid of 1...

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Bibliographische Detailangaben
Hauptverfasser: JAMES EARL HATAWAY, KENNETH ALAN ROBERTS, VALENE SUE ADAMS
Format: Patent
Sprache:ind
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:This application relates to a three step process for preparing copolyesters exhibiting a neutral hue, high clarity and increased brightness. The process involves reacting terephthalic acid, ethylene glycol, and 1,4-cyclohexanedimethanol in a feed mole ratio of total glycols to dicarboxylic acid of 1.7:1 to 6.0:1 at a temperature of 240 DEG C to 280 DEG C, and a pressure of 15 psig (200 kPa) to 80 psig (650 kPa) to form an esterification product; adding a polycondensation catalyst and a toner; and polycondensing the product at a temperature of 260 DEG C to 290 DEG c and a reduced pressure to form a high molecular weight copolyester.